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NABCEP PV Installation Professional (PVIP) Board Certification Sample Questions:

1. An installer is sizing conductors for a 200-foot PV source circuit with a current of 8A at 400V DC. The design specifies a 1.5% voltage drop using copper wire at 30°C. What is the minimum wire size required?

A) 8 AWG
B) 12 AWG
C) 10 AWG
D) 6 AWG

2. A module's STC power is 300W, with a temperature coefficient of -0.40%/°C. At 65°C, what is the power loss percentage?

A) 16%
B) 14%
C) 12%
D) 18%

3. A grid-tied PV system uses a transformerless inverter with a maximum DC input of 1000V. The array consists of 20 modules, each with a Voc of 45V. What is the NEC 690.7 correction factor for a low temperature of -15° C if the temperature coefficient is -0.30%/°C?

A) 1.18
B) 1.21
C) 1.12
D) 1.15

4. A system's performance ratio (PR) is calculated as 0.85. If the array capacity is 10 kW and PSH is 5, what is the daily AC output?

A) 45 kWh
B) 40 kWh
C) 50 kWh
D) 42.5 kWh

5. A PV array is installed near a pool. What is the minimum distance required from the water's edge per NEC
690.31?

A) 5 feet
B) 15 feet
C) 20 feet
D) 10 feet

Solutions: